25.6.4 Timer1 Gate Single Pulse Mode

When Timer1 Gate Single Pulse mode is enabled, it is possible to capture a single pulse gate event. Timer1 Gate Single Pulse mode is first enabled by setting the GSPM bit. Next, the GGO/DONE must be set. The Timer1 will be fully enabled on the next incrementing edge. On the next trailing edge of the pulse, the GGO/DONE bit will automatically be cleared. No other gate events will be allowed to increment Timer1 until the GGO/DONE bit is once again set in software.

Clearing the GSPM bit will also clear the GGO/DONE bit. See the figure below for timing details. Enabling the Toggle mode and the Single Pulse mode simultaneously will permit both sections to work together. This allows the cycle times on the Timer1 gate source to be measured. See the figure below for timing details.